Frank cochrane



UNITED STATES PATENT OFFICE.

FRA K cocHnANE, or CHEADLE HULME, ENGLAND.

rRonUc'rioNor FABRICS HAVING THE PROPERTY or I vIsIBILIrY.

' No Drawing.

To all whom it may concern: Be it known that I, FRANK CoonRANn a subjectof the King of Great Britam and Ireland, and resident of MiddletonCottage, Cheadle Hulme, in the county of Chester, England, have inventedcertain new and useful Improvements Relating to the Production ofFabrics Having the Property of Invisibility, of which the following 1s aspecificatio This invention relates to the production of fabrics which,by their coloring, are given a high degreeof invisibility when looked atfrom a distance, and has for its object to provide an effective andready method of producing such fabrics.

My invention comprises the padding of the fabric with a solution of acoloring matter capable of producing at least two colors by developmentby suitable metalllc salts, and the development and fixing (by treatmentwith one metallic salt) of a 11111- form ground color upon which theother color or colors is or are developed in promiscuous patches by theapplication of other metallic salts by hand or otherwise In oneconvenient application of my mvention, the cotton, woolen, linen orother fabric is padded in a cold solut1on of su1table dyewood extractssuch as fustic, cutch and sumac. It is then passed through a bathof aboiling aluminium salt, whereby the ground color, such as fustic, 1sdeveloped and fixed.

Other developers or metalllc salts, such as potassium bichromate, andsuitable salts of iron, .are applied by hand or otherwlse to producepromiscuous color patches. The

fabric is then folded and allowed to stand so that the colors may spreadand blend with the ground color and also so that the metallic salts oncontacting parts of the material may print off or transfer from one tothe other. The fabric is then dried at a high temperature in order tofurther develop and fix the colors.

The aluminium salt employed in the developing and fixing of the groundcolor acts as a retarder upon the subsequent metallic salts so that thecolors produced are less pronounced and blend with or shade off into theound better than they otherwise would:

The dyewood extracts and metallic salts Specification of Letters Patent.

in paddmg the Patented June 10, 1919.

q Application filed June 18, 1917. Serial No. 175 ,5 22. M

hereinbefore specified are employed in solumedia (such as fustic, cutchand sumac) for producing a plurality of colors, one color 2'. e., theground color, being developed by the mordant aforesaid and the remainingcolors being ready for subsequent development in promiscuous patches ina manner substantially as in connection with the previously describedapplication of my invention.

Having now described my invention what I claim as new and desire tosecure by Letters Patent 1s:- 1. The process of producing fabrics havmgthe property of invisibility consisting fabric in a solution of acoloring matter capable of producing a plurality of colors bydevelopment by metallic salts, developing and fixing a uniform groundcolor by one metallic salt and developing and fixing promiscuous colorpatches upon said ground color by at least one other metallic salt, asset forth.

2. In the production of fabrics having the property of invisibility, thetreatment of the fabric as follows :-(1) Padding the fabric with asolution of a coloring matter capable of producing a plurality of colorsby development by means of metallic salts (2) developing and fixing auniform ground color by treatment with one metallic salt developing uponthe ground color promiscuous color patches in a plurality of colors bythe application of a plurality of separate metallic salts by hand, asset forth.

3. In the production of fabrics having the property of invisibility, thetreatment of the fabric as follows :(1) Padding in a cold solution ofdyewood extracts (:2) developing and fixing a uniform ground color by ametallic salt (3) developing upon the ground color a plurality of othercolors in promiscuous patches by the application of other metallic saltsby hand (4) dryin the fabric at a high temperature, as set orth.

4. In the production of fabrics having the property of invisibility, thetreatment potassium bichromate and suitable salts of iron by handfolding the -Wet"fabric as set forth.

(5) drying the fabric at a high temperature, 10

In testimony whereof I have signed my name to this specification in thepresence of tWo subscribing witnesses.

v FRANKCQGHRANE. Witnesses: r f ARTHUR HUGHES,

EWALD SIMPSON MOSELEY.

Copies 0! this patent may be obtained for iive cents each, by addiessingthe Commissioner of i'atent s, T'Yashington,11.0." V 7-. a

